// 基本样式
* {
    margin: 0;
    padding: 0;
}

li {
    list-style: none;
}

a {
    text-decoration: none;
    color: black;
}

// 版心
.w {
    width: 1200px;
    margin: 0 auto;
}

// 顶部导航栏
.top {
    display: flex;
    justify-content: space-between;
    color: #000;
    height: 45px;
    background-color: rgba(255, 255, 255, 0.7);
    box-shadow: 0 0 15px #747474;
    position: fixed;
    width: 100vw;

    .logo {
        width: 8vw;
        background-color: #422f2f;
        color: white;
        text-align: center;
        line-height: 35px;
        border-radius: 20px;
        margin: 5px;
    }

    .nav {
        width: 30vw;
    }
}
.box {
    width: 800px;
    margin: 150px auto;
}

.timeline {
    list-style: none;
}

.timeline li {
    border-left: 2px solid skyblue;
    position: relative;
    padding: 15px;
}

.timeline li:first-child::after {
    transform: scale(1.5);
    border-color: hotpink;
}

.timeline li::after {
    box-sizing: border-box;
    content: "";
    position: absolute;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 3px solid blueviolet;
    background-color: #fff;
    left: -8px;
    top: 0;
}

.timeline li:hover::after {
    border-color: red;
}

.null_box {
    height: 150px;
}

.box{
    margin: 0 auto;
    width: 800px;
}




.box {
    font-size: 14px;
}

.title {
    padding-top: 10px;
    transition: all .5s;
}

li>a {
    display: block;
    text-decoration: none;
    color: black;
}

li:hover .title {
    color: rgb(70, 185, 174);
    transform: translateX(20px);
}

.timeline li img {
    float: left;
    width: 80px;
    margin-right: 15px;
}